Stop motion



Si Q N TOR.

ATTORNEYS.

mllnl W. J. SCOTT May 15, 1951 STOP MOTION Filed June 24, 1946 Patented May 15, 1951 STOP MOTION Walter J. Scott, Woonsocket, R. I.

Application June 24, 1946, Serial No. 678,905

2 Claims.

This invention relates to a drawing frame and is an improvement upon the stop motion shown in my prior Patent No. 1,848,667 dated March 8, 1932.

In the above mentioned patent, the feeler member swings by gravity through an arc so that when its free edge arrives at a point most distant from the pivot the contact is made to cause a stop motion to operate. A partial eiiect of the mass of the member is all that there is to force contact to cause the actuation of the stop motion. Dust and lint may collect on one oi the contacts and interfere with its operation and so far as the movement of the parts into contact is concerned, there is nothing to wipe the contacts clear.

One of the objects of this invention is to provide a more positive electrical connection for actuation of the stop motion.

Another object of this invention is to provide a wiping ocntact with a relationship so that one part slides along another through an extent sufficient to keep a surface clear of lint or dust.

Another object of the invention is to provide a shield which will efectively prevent collection of dust on the xed contact which is provided.

With these and other objects in View, the invention consists of certain novel features of construction, as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

Fig. 1 is a diagrammatic elevation illustrating a drawing frame equipped with my improved stop motion;

Fig. 2 is an elevation of the stop motion shown in Fig. 1;

Fig. 3 is an elevation looking at the back of the stop motion as shown in Fig. 1;

Fig. 4 is an elevation on a larger scale of a fragmental portion of the stop motion mechanism shown in Fig. 1;

Fig. 5 is a perspective view of the feeler member of the stop motion;

Fig. 6 is a section on line 6-6 of Fig. 4.

In proceeding with this invention, I have mounted an arm on the feeler member at a location close to the pivot. The arm is off the center of the pivot so as to be given some arcuate motion and the end of the arm is so bent that an increase of the arcuate motion is provided. This swinging motion is utilized for providing a wiping contact of this arm along a contact bar for closing the circuit to operate the stop motion of the drawing frame in accordance with the disclosure in the above-mentioned Patent No. 1,848,667.

With reference more specifically to the drawings, there are a plurality of slivers which are drawn from a supply can II and which pass through the gill mechanism designated generally I2 and are delivered as at I3 to a trumpet or condenser I4 and then fed by rolls I5 into a receiving can I6. The stop motion which I provide is of electrical character and is designated generally I6 as shown in Fig. 1 and is mounted between the supply can II and the gill box.

This stop motion consists of a bar I1 which is provided with a plurality of openings I8 through which each of the slivers is guided. The sliver may enter this opening through a slot I9 at the edge of the bar and is prevented from escape from the opening I8 by means of the rod 2l) spaced from the edge oi the bar II and extending along the several openings in the bar. At the upper end of the bar an eye 2l is cast for the reception of the supporting rod 22. A contact or bus bar 23 is mounted in insulating relation to the bar I'I by means of fiber spacing washers 24 (see Fig. 4) located at spaced points along the bar. Some electrical wire may be connected to the upper end of this bus bar as at 25.

Feeler members 26 are pivoted on eyes 21 by means of pins 28 which eyes are located above and in a position so that the feeler members will swing downwardly across the openings I8 but these feeler members 26 are held in elevated position as shown in Fig. 1 by the slivers I0 in their passage through the openings and to the gill box. An arm 3B extends laterally from each of the feeler members 26 and is generally of angular shape as shown in Fig. 5. The end 3| of this arm is bent so as to increase the diameter of the arcuate path of the arm as it moves over the bus bar 23. Thus, should a sliver I0 fail or become so slack as to allow the feeler arm to descend into the position shown in Fig. 4J this arm 3l! will wipe across the bus bar 23 and establish an electrical connection from the metal frame work upon which the feeler member is mounted to the insulated bus bar whereupon the machine will be stopped through mechanism which is well known.

In order to shield from dirt the contact surface of the bus bar against which each of the arms engages, a lip, shelf or shield 35 of generally L-shaped construction is positioned over each of the contact surfaces and above a loca-- tion at which the arm will move so that lint or foreign matter will be prevented from collecting on this stationary surface which is engaged for electrical contact or circuit.

I claim:

1. In a stop motion device for a drawing frame comprising a body portion having an opening through which the sliver passes, a Xed Contact carried by said body portion, a feeler member for resting on the sliver, a pivot for said member so arranged that the member will move down- Wardly upon slackening of the tension of said sliver, and an arm carried by said member at a location4 between the pivot axis and the center of gravity of said' member an extending generally parallel to said pivot and movable in an are of a radius slightly greater than the shortest distance between the axis of the pivot and the contacting side of said Contact but less than the radius of the are through which the sliver engaging4 portion 'of said feeler member travels: wherebyto have sweeping engagement with said contact.

2. In a drawing frame as set forth in claim 1 wherein a shield extends over the said contact to protect the same from gathering dust.

WALTER J. SCOTT.

REFERENCES CITED The following references are of record in the o iley of this patent:

UNITED STATES PATENTS Number Name Date 555,692 Geb Mar. 3, 1896 767,965 Scott Aug, 16, 1904 1,778,097 Waohsman Oct. 14, 1930 1,848,667 Scott Mar. 8, 1932 

